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Micro-optimize rustdoc search index parsing #148522

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Micro-optimize rustdoc search index parsing #148522

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13 changes: 3 additions & 10 deletions src/librustdoc/html/render/search_index/encode.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -78,16 +78,9 @@ pub fn read_postings_from_string(postings: &mut Vec<Vec<u32>>, mut buf: &[u8]) {
while let Some(&c) = buf.get(0) {
if c < 0x3a {
buf = &buf[1..];
let mut slot = Vec::new();
for _ in 0..c {
slot.push(
(buf[0] as u32)
| ((buf[1] as u32) << 8)
| ((buf[2] as u32) << 16)
| ((buf[3] as u32) << 24),
);
buf = &buf[4..];
}
let buf = buf.split_off(..usize::from(c) * size_of::<u32>()).unwrap();
let (chunks, _) = buf.as_chunks();
let slot = chunks.iter().copied().map(u32::from_le_bytes).collect();
postings.push(slot);
} else {
let (bitmap, consumed_bytes_len) =
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